Steam-generator.



N0. 692,03L I Patented lan. 28, I902.

G. H. RHEUTAN.

I STEAM GENERATOR.

(App lication filed July 1.6, 1901.) 6 Sheets-Sheet I.

( No Model.)

WTTH E 5 5 55- No. 692,03I. Patented 'lan.'28, I902.

a. H. BHEUTAN.

STEAM GENERATOR.

(Application filed July 16, 1901.) (No Modal.) 6 Sheets-Sheet 2.

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Patented Ian; 28, I902,

a, H. RHEUTAN. STEAM GENERATOR.

(Application filed July 16, 1901.)

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(No Model.)

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N0. 692,03l. Patented Jan. 28, 1902.

' G. H. RHEUTAN.

STEAM GENERATOR.

7 (Application filed July 18, 1901.) (No Model.) s S heets-Sheet' 4.

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N0.v 692,03]. Patented Jan. 28, I902.

G. H. RHEUTAN.

STEAM GENERATOR.

(Application filed. July 16, 1901.) I (No Model.) 6 Sheets.$heet 5.

Nu. 692,03l.

; a. H. RHEUTAN.

STEAM GENERATOR.

'(Appliciibionfiled July 16, 19Q1.)

'Patented Jan. 28, I902.

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4o Said casing covers the ends and sides of the UNITED STATES PATENT OFFICE.

GARRETT HERRING RHEUTAN, OF SAN. FRANCISCO, CALIFORNIA, ASSIGNOR OF ONF-IIALF TO B. B. LINCOLN, OFWVALTHAM, MASSACHUSETTS.

STEAM-GENERATOR..

SPECIFICATION forming part-of Letters ma No. 692,031, dated January as, 1902 Application filed July 1901.

T cLZZ whom, it may concern:

Be it known that I, GARRETT HERRING RHEUTAN, of San Francisco, in the county of San Francisco and State of California, have invented certain new and useful Improvements in Steam-Generators, of which the fol lowing is a specification. t

This invention has for its object to provide a boiler or steam-generator adapted particuxo larly for marine use, but not necessarilyconfined thereto, which shall combine the rapid steaming qualities of the Water-tubeboiler with the safety and durability of the less-complicated Scotch type of boiler in extensive [5 use. i

The invention consists in the improvements which I will now proceed to describe and claim. p

Of the accompanying drawings, forming a part of this specification, Figure 1 represents a partial end elevation and partial transverse section of a steam-generator embodying my invention. Fig. 2 represents a section on line 2 2 of Fig. 1. Fig. 3 represents a partial end elevation and partial transverse section ofanother embodiment of my invention. Fig. 4 represents a partial side elevation and partial longitudinal sectionof the embodiment shown in Fig. 3. Figs. 5 and 6 are views cor o responding,respectively, with Figs. 3 and 4 and illustrating another embodiment or myinvention. a a t v The same reference characters indicate the t same parts in all the figures. v

In the drawingsm, represents the furnacegrate. The fire-space over the grate is inclosed by an external boiler portionformed as a casing having an outer wall 1 and an inner wall 2, between which is awater-space.

"fire-space and extends across the top of the same and presents a large area of heat-ab; sorbing and steam-generating surface to the fire-space, besides confiningthe products of combustion around the inner water-tube portion of the boiler, hereinafter described.

The formand construction of the external boiler portion may be variously modified, and I have shown in the drawings three-forms of construction embodying my invention.

to form a steam-drum c.

'In the embodiment of my invention shown Serial No. 88,507| (No model.)

in Figs. 1 and 2 the external boiler portion is widened or enlarged at its side portions just above the level of the grate to form waterdrums b b and is also wideuedor enlarged at itscentral portion over the center of the grate The walls 1 and 2 of the external boiler portion are curved outwardly and nested together to form the outer walls of the water-drums In and the inner 6o walls of said dru ms are formed by tube-sheets b, which are riveted at their edges to the inner wall 2 and are of'crownin g form or of relatively slight curvature, so that the tubes d of the inner water tube portion of the boiler can be conveniently inserted at their lower ends in said sheets. The ends of the Water-drums communicate with the ends of the external boiler portion, and the upper and lower portions of the water-drums communicate with the Water-spaces above and below the waterdrumsthrough orifices e 6, formed in the inner wall 2. This construction of the waterdrums insures great strength and stiffness and freedom from liability to distortion and displacement of parts. The outer wall 1 ot the, external boiler portion is curved outwardly to form the outer wall of the,

steam drum, and the-finner wall of said drum is formed by a tube-sheet f, which 8:) is of substantially semicircular form and extends across the space between the inner and outer walls 1 2and is'riveted at f to the outer wall of the steam-drum and at f to flanges 20, formed on the inner wall 2. The 8 place as the outer wall of the steam-drum.

The tubes at of the internal water-tube boiler are inclined inwardly andupwardly from the water-drums b to the steam-drumc and are preferably bent, as indicated in Fig. 1, each 5 tube havingone or more bends, whereby it is permitted to move laterallywhen-expand= ing or. contracting, so that excessive strain on the tube-sheets to which the ends of the tubes are attached is prevented. The tubes (1 are interposed between the grate and the sides of the external boiler portion between the wa- 50 the outer'sidesof the water-leg.

ter-drums and the steam-drum. Said sides are provided with suitable outlets g g for the products of combustion, said outlets extending through the water-space of the external 5 boiler portion and being connected by pipes g g with trunks or tlues h, which may communicate with the base of a smoke-stack. (Not shown.) The arrangement of the outlets g is such that the products of combustion to necessarily pass through the spaces between the tubes at on their way to the outlets. It will be seen that the external boiler portion confines the products of combustion around the tubes-d of the water-tube portion and I5 regulates the passage of the said products through the spaces between the tubes. The inner wall 2 of the outer boiler portion adds to the large area of heat-absorbing surface of the generator and is protected by the water and steam spaces between the inner and outer walls, so that safety and durability arerinsured and the heat is economized. The parts of the external boiler portion between the lower rows of tubes at and the level of the '25 grate are protected from the fire in this as well as in the other embodiments of my in: vention hereinafter described by walls .9 of

' fire-brick. The form and arrangement of the tube-sheets b and f is such that the tubes d can be inserted and removed at any point on v said sheets by a workman stationed within the furnace. The outer and inner walls 1 and 2am here shown as extended from one water-' drum to the other under the grate, thus forming a water-bottom. i In Figs. 3 and 4 I show an embodiment of my invention in which the external boiler portion is extended as a water-leg only a short distance below the water-drums. The said 4o water-leg is formed by thelower portions of the walls 1 2 and filling strips or bars 3 interposed between the said walls and bolted r.or riveted thereto. It will be seen that the Water-leg, extending belowthe watendrums 451) b, constitutes a truss or girder-like support for the water-drums, preventing any spreading or distortion of the walls of said drums. The said water-leg is supported bystandards 'orbrackets 11, having flanges t" bearing against These brackets are. rigidly secured, and they collectively constitute a support which holds the boiler securely in place. j represents an ashpan having wheels is, journaled on arms Z, '55 afiixed to the sides of the pan. The hubs of thewheels k are elongated and form rollers 70, which when the ash-pan is in place,'bear on fixed track-rails m. Said rails are elevated, so that when the rollers k'rest on them the wheels are raised slightly from the floor. The outer ends of; the tracks mare curved downwardly, as shown in Fig. 4, and when the rollers run off from these curved ends the wheels it drop onto the floor of the boiler- 65 room. The track-rails m are supported by the brackets i at opposite sides of the space under the grate. It will be seen that the rails m and rollers It constitute the entire support for the ash-pan when the latter is in place, so that there is no occasion for a fioor or other support under the ash-pan. A large opening may therefore be made in the boilerroom floor under the grate, so that the structure and hull of the vessel may be conven iently inspected.

Figs. 5 and 6 show'a modification in which the water and steam drums b b and- 0 instead of being formed as enlargements or integral parts of the external boiler portion are formed independently of the walls 1 2 of the external boiler portion and are suitably connected with the space between said walls. An additional steam drum or dome 0 is provided above the outer boiler portion, and

mud-drums p p are provided at the lower tions of the fire-space which are'leftvacant by the illustrated arrangement of the tubes (1.

Baffle-plates (shown in Fig. 4 andby dotted linesin Fig. 3) may be secured to the inner walls of the ends of the external boiler portion, said plates being formed to fill the spaces between said ends and the tubes at adjacent to the said ends. These bafiie-plates prevent the products of combustion from pass-, ing too freely between the ends of the rows of tubes 01 and the ends of the external boiler portion. I

I claim I 1. A steam-generator comprising a grate,an external boiler portion formed as a casing inclosing a fire-space overthe grate, the sides of the external boiler-portion being widened to form water-drums extending longitudi ICC nally of the boiler, and an internal water-tube boiler composedof tubes extending inwardly and upwardly from said. water-drums to the steam-space of the external boiler portion, the tubes being within said fire-space.

"2. A steam-generator comprising agrate,an external boiler portion formed as a casing inclOsing a fire-space over the grate, the steam spaceof theexternal boiler portion being widened to form a longitudinally-extending steam-drum,'and an internal water-tube boiler portion composed of tubes extending inwardly and upwardly from opposite sides of the grate and communicating at their lower ends with the Water-space ofv the external boiler portion and at their upper ends with said steamdrum, the tubes being within the said firespace.

3. Asteam-generatorcomprisingagrate,an

external boiler portion formed as a casing inclosing a fire-space over the grate, the sides of the external boiler portion is widened to form a longitudinally-extending steamdrum, and inclined tubes connected at their lower ends with the water-drums and at their upper ends with the steam-drum, the said tubes constituting an internal water-tube boiler portion located within the fire-space.

4. A steam-generator comprising an external boiler portion formed as a casing inclosing" a fire-space and having its sides widened to form water-drums, the inner sides of said drums being of crowning form, and inclined tubes inserted at their lower ends in said crowning inner sides and connecting said water-drums with the steam-space of the external boiler portion, the tubes constituting" an internal water-tube boiler portion located in said fire-space.

5. A steam-generator comprising an external boiler portion formed as a casing inclosing a fire-space and having its walls curved outwardly and nested together along its lower sides to form the outer walls of water-drums, and crowning tube-sheets affixedto the inner wall of the external boiler portion and forming the inner walls of said water-drums, and inclined tubes inserted at their lower ends in said tube-sheets and connecting said drums with the steam-space of the external boiler portion, the tubes being within the fire-space.

6. A steam-generator comprising an external boiler portion formed as a casing inclosing a fire-space and having its outer wall curved outwardly to form the outer wall of a longitudinally-extendin g steam-drum, and its inner wall curved inwardly to form the inner wall of said steam-drum, and inclined tubes inserted at their upper ends in the inner wall of the steam-drum and connecting said steamdrum with the water space of the external boiler portion.

7. A steam-generator comprising an external boiler portion formed as acasing inclosing a fire-space and having its outer wall curved outwardly to form the outer wall of a longitudinally-extending steam-drum, the inner wall of the external boilerportion being composed in part of a tube-sheet forming the inner wall of said steam-drum, theedges of said tube-sheet being attached to the outer walls of the external boiler portion, and in an external boiler portion formed as a casing inclosing a fire-space over the grate, said portion having outlets forthe productsof combustion, and an internal water-tube boiler portion composed of inclined tubes extending inwardly and upwardly from opposite sides of the grate and communicating at their lower ends with the side water-spaces of the external boiler portion and at their upper ends with the steam-space thereof, said tubes being interposed between the grate and the said outlets, whereby the products of combustion are caused to pass between the tubes on their way to said outlets.

9. A steam-generator comprising a grate,

an outer jacket-shaped steam-generating portion inclosing a fire-space over the grate, an inner water-tube portion located within said space, and longitudinal water-tubes extending from the front to the rear ends of the jacket portion substantially at right angles with the tubes of the water-tube portion, said longitudinal tubes being located between the inner tubes of said water-tube portion and the jacket portion.

10. A steam-generator comprising an external boiler portion formed as a casing inclosing a fire-space and having its sides widened to form water-drums of crowning form at their inner sides, the said external portion being extended below said drums to form a water-leg which acts as a truss or girder to prevent the spreading or distortion of said drums, and inclined tubes inserted at their lower ends in said crowning inner sides and connecting said water-drums with the steamspace of the external boiler portion.

11. A steam-generator comprising a grate, an external boiler portion formed as a casing inclosing a fire-space over the grate, saidportion having outlets for the products of cornbustion, an internal water-tube boiler portion composed of inclined tubes extending inwardly and upwardly from opposite sides of the grate and communicating at their lower ends with the side water-spaces of the external boiler portion and at their upper ends with the steam-space thereof, said tubes being interposed between the grate and the said outlets, whereby the products of combustion are caused to pass between the tubes on their way to said outlets, and baffie-plates closing the spaces between the ends of the external boiler portion and the ends of the water-tube portion. i g

In testimony whereof I have afiixed my signature in presence of two witnesses.

, GARRETT HERRING RHEUTAN.

W'itnesses: V

. O. F. BROWN,

E. BATCHELDER. 

